Composition of matter for waterproofing porous surfaces.



Long Beach, California,

UNITED STATES PATENT OFFICE.

WILLIAM L. O'KELLY, OF LONG BEACH, CALIFORNIA.

COIPOSI'IION OF MATTER FOR WATERPROOFING POROUS SURFACES.

1,107,545. Ho Drawing.

To all whom it may concern:

Be it known that I, WILLIAM L. 'OKELLY, a citizen of the United States, residing at have invented a. new and useful Composition of Matter for Waterproofing Porous Surfaces, of which the following is a specification.

This invention comprises of matter the ingredients of which cooperate with each other to roduce a fluid which, when applied to bric walls, laster,

cement, and other porous surfaces em a coating impervious to water and to liquids 1n neral.

- no object of the inventionis to provide a composition of the character stated that will not change the color or appearance of the surface to which it is applied. After has been treated appearance of the brick except that the surface of the wall is-rendered slightly glossy in appearance. The invention, however, is not limited to a colorless mixture, but various pigments may be added to color the same as desired.

This composition of matter isformed by mixing together the following ingredients in substantially the proportions stated: one gallon sweet milk (preferably unskimmed) two ounces rock salt, one ounce of alum, 1 and ounces liquid formaldehyde. The alum thickens the mixture, the salt keeps it from becoming dry or crusty after being Specificationpf Letters Patent.

a composition Patented Aug. 18, 19ft.

' Application filed January a sle. Serial No. 810,167.

applied to the surface coated; the formaldehyde keeps the milk from souring;

By theme of both salt and alum in the mixture in stated an improved result is obtained by reason of the salt counteracting the tendency of the alum to form an undesirable scaly crust on the coated surface. Thus the thickening function of the alum is retained and at the same time the undesirable crusty formation eliminated.

I claim: Y

1. A composition of matter for waterproofing consisting of a mixture of uncoagulated milk, rock salt, alum, and formaldehyde inabout the following proportionsz. one gallon milk; two ounces rock salt; one ounce alum;' one a-ndone-fourth ounces of formaldehyde. 1

2. A composition of matter consisting of a mixture of sweet milk, a preservative sufficient in quantity to keep the milk from souring, and approximately one ounce of alum and two ounces of salt t9 each. gallon of milk. I In testimony whereof I have hereunto signed my name in the presence of'two subscribing witnesses at Los Angeles, in the county of Los Angeles and State of Calivfornia, this 29th day of December, 1913.

substantially the proportions- 

